McGrath Thunderhorse IV - Pool Blue - 8.8lbs

McGrath Thunderhorse IV – Pool Blue

This Thunderhorse IV, finished in a striking Pool Blue, is a refined evolution of our signature design. Based on the popular model showcased at NAMM 2026, this bass features an updated neck pickup position—moved back 3/8" to provide ample clearance for slap players.

The body and headstock are uniquely hand-painted by Madelyn McGrath, making this instrument a true work of art.

Key Components

Pickups: This bass is equipped with three EMG HZ passive pickups configured in our signature layout: Thunderbird, Reverse P, and J.

Preamp: These pickups are routed through an EMG BQ30 3-band preamp, operating at 18 volts for maximum headroom.

Hardware: The bridge and tuners are Leo Quan Badass units, all finished in Black.

Controls:

Each pickup features an individual Switchcraft On/Off slider switch.

The master volume knob is a pull/push switch for true bypass Active/Passive operation.

 

Build & Comfort

 

Body: The mahogany body provides excellent resonance and lightweight performance.

Weight: Fully loaded, this bass weighs a comfortable 8.8 lbs.

Neck Profile: The neck features a 1.5-inch J-style nut width, designed for comfort and speed. 

Stainless steel frets

Carbon fiber reinforcement rods for neck stability

Two-way spoke nut truss rod

A matching headstock completes the premium package.

Specifications

Model: Thunderhorse IV (2026)

Body: Solid Mahogany

Neck: Roasted Flame Maple

Fingerboard: Roasted Flame Maple

Scale Length: 34"

Nut Width: 1.5"

Radius: 12"

Weight: 8.8lbs lbs

Pickups: EMG HZ Neck, P and Jazz

Preamp: EMG BQ30 running at 18 volts 

Switching: Switchcraft Sliders for Pickup Selection

Knobs: Volume (Push/Pull), Bass, Mid, Treble

Push-Pull Function: True Bypass Active/Passive

Bridge: Badass High Mass

Tuning Machines: Badass Lightweights

Hardware Finish: Black

Pickguard: Simulated Anodized Silver

Case: Gator Gig Bag